CN113685916B - An air conditioning system and its control method - Google Patents
An air conditioning system and its control methodInfo
- Publication number
- CN113685916B CN113685916B CN202010427299.4A CN202010427299A CN113685916B CN 113685916 B CN113685916 B CN 113685916B CN 202010427299 A CN202010427299 A CN 202010427299A CN 113685916 B CN113685916 B CN 113685916B
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- Prior art keywords
- heat exchanger
- outdoor heat
- compressor
- control valve
- communicated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
本发明公开一种空调系统及其控制方法，涉及空调技术领域，用于解决空调容易结霜的问题。本发明包括压缩机和制冷剂主回路，制冷剂主回路上依次串联有室内换热器、节流装置、室外换热器组件，室外换热器组件包括相互并联的第一室外换热器和第二室外换热器；第一控制阀安装在制冷剂主回路上；第二控制阀安装在第一室外换热器与压缩机之间的管道上、且与第二室外换热器并联；第三控制阀安装在第二室外换热器与节流装置之间的管道上、且与第一室外换热器并联，连接支路的一端与第二控制阀连通，连接支路的另一端与第三控制阀连通，第二控制阀控制第一室外换热器与压缩机或连接支路连通，第三控制阀控制第二室外换热器与连接支路或节流装置连通。
This invention discloses an air conditioning system and its control method, relating to the field of air conditioning technology, and is used to solve the problem of air conditioners easily frosting. The invention includes a compressor and a refrigerant main circuit. An indoor heat exchanger, a throttling device, and an outdoor heat exchanger assembly are connected in series on the refrigerant main circuit. The outdoor heat exchanger assembly includes a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel. A first control valve is installed on the refrigerant main circuit. A second control valve is installed on the pipe between the first outdoor heat exchanger and the compressor, and is connected in parallel with the second outdoor heat exchanger. A third control valve is installed on the pipe between the second outdoor heat exchanger and the throttling device, and is connected in parallel with the first outdoor heat exchanger. One end of a connecting branch is connected to the second control valve, and the other end of the connecting branch is connected to the third control valve. The second control valve controls the first outdoor heat exchanger to connect to the compressor or the connecting branch, and the third control valve controls the second outdoor heat exchanger to connect to the connecting branch or the throttling device.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
An air conditioner is a common household appliance, and consists of a refrigerating compressor, a condenser, a capillary tube, an evaporator, an electromagnetic reversing valve, a filter, a refrigerant and the like, so that the aim of refrigerating or heating is fulfilled.
When the existing air conditioner heats and runs in winter, frosting phenomenon is easy to occur to the heat exchanger of the outdoor unit, defrosting is needed to be frequently performed, indoor heating is stopped in the defrosting process, and indoor comfort is poor.
Disclosure of Invention
The invention provides an air conditioning system and a control method thereof, which are used for solving the problem that air is easy to frost in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides an air conditioning system which comprises a compressor, a refrigerant main loop, a connecting branch, a second control valve, a first control valve, a third control valve and a third control valve, wherein the refrigerant main loop is used for connecting an exhaust port of the compressor with the indoor heat exchanger component, or connecting an exhaust port of the compressor with the indoor heat exchanger, or connecting an air inlet of the compressor with the outdoor heat exchanger component, the indoor heat exchanger component comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel, the first control valve is arranged on the refrigerant main loop, the first control valve is used for controlling the exhaust port of the compressor to be communicated with the indoor heat exchanger component, or controlling the exhaust port of the compressor to be communicated with the indoor heat exchanger, or connecting the air inlet of the compressor to be communicated with the outdoor heat exchanger component, the second control valve is arranged on a pipeline between the first outdoor heat exchanger and the compressor in parallel, and the first control valve is used for connecting the second control valve with the first control valve to be connected with the first control valve and the second control valve to be connected with the second control valve and the first control valve and the second control valve to be connected with the third control valve to be connected with the outdoor heat exchanger in parallel.
In some possible embodiments of the present invention, the air conditioning system further comprises a heat recovery branch and a heat recovery device, wherein the heat recovery branch is connected between the compressor and the throttling device and is connected with the indoor heat exchanger in parallel, the heat recovery device comprises a first heat exchange flow path and a second heat exchange flow path which are mutually heat exchanged, the first heat exchange flow path is connected to a pipeline between the outdoor heat exchanger component and the throttling device, and the second heat exchange flow path is connected to the heat recovery branch, so that heating and defrosting can be performed simultaneously, and liquid impact can be prevented.
In some possible embodiments of the invention, the air conditioning system further comprises a first regulating valve mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the throttling device.
In some possible embodiments of the invention, the air conditioning system further comprises a second regulating valve mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the compressor.
In a second aspect, the invention provides a control method for the air conditioning system according to the technical scheme, which comprises the following steps that when a heating control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device, and when a refrigerating control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the outdoor heat exchanger assembly, the air suction port of the compressor to be communicated with the indoor heat exchanger, the second control valve controls the first outdoor heat exchanger to be communicated with the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch.
In some possible embodiments of the present invention, the air conditioning system further includes a first control valve and a second control valve, the first control valve being mounted on the regeneration branch and located between a second regeneration flow path of the regenerator and the throttle device, the second control valve being mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the compressor, the control method further including, when it is detected that the air conditioning system satisfies a defrost condition, the first control valve controlling an exhaust port of the compressor to communicate with the indoor heat exchanger, an intake port of the compressor to communicate with the outdoor heat exchanger assembly, the second control valve controlling the first outdoor heat exchanger to communicate with the intake port of the compressor, the third control valve controlling the second outdoor heat exchanger to communicate with the throttle device, opening the first control valve and the second control valve, and when it is detected that the air conditioning system satisfies a defrost stop condition, closing the first control valve and the second control valve.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes adjusting the opening degree of the first regulating valve when it is detected that the pressure of the refrigerant on the regenerative branch near the end opening of the compressor is different from the pressure of the refrigerant on the indoor heat exchanger near the end opening of the compressor after the first regulating valve and the second regulating valve are opened.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes, after receiving the refrigeration control signal, opening the first regulating valve and the second regulating valve when it is detected that the suction superheat degree of the air conditioning system is in a first preset temperature range and the duration of the suction superheat degree of the air conditioning system in the first preset temperature range is greater than a preset time, and closing the first regulating valve when the suction superheat degree of the air conditioning system is in a second preset temperature range.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes adjusting the opening degree of the second regulating valve when detecting that the refrigerant pressure on the regenerative branch near the opening of the first control valve is different from the refrigerant pressure on the indoor heat exchanger near the opening of the throttle device after the first regulating valve and the second regulating valve are opened.
The air conditioning system comprises a compressor, an indoor heat exchanger, a throttling device and an outdoor heat exchanger component which are sequentially connected in series on a main loop of a refrigerant, wherein a first control valve on the main loop of the refrigerant can control the air outlet of the compressor to be communicated with the outdoor heat exchanger component, the air suction inlet of the compressor to be communicated with the indoor heat exchanger, or the air outlet of the compressor to be communicated with the indoor heat exchanger, and the air suction inlet of the compressor to be communicated with the outdoor heat exchanger component, so that the refrigerating or heating operation mode of the air conditioner is switched. Compared with the prior art, the outdoor heat exchanger assembly comprises a first outdoor heat exchanger, a second control valve, a third control valve and a connecting branch, wherein the first outdoor heat exchanger and the second outdoor heat exchanger are mutually connected in parallel, the second control valve is arranged on a pipeline between the first outdoor heat exchanger and the compressor and is connected in parallel with the second outdoor heat exchanger, the third control valve is arranged on a pipeline between the second outdoor heat exchanger and the throttling device and is connected in parallel with the first outdoor heat exchanger, one end of the connecting branch is communicated with the second control valve, and the other end of the connecting branch is communicated with the third control valve. When the air conditioning system is in a heating mode, the first outdoor heat exchanger and the second outdoor heat exchanger are both positioned at the low pressure side of the main loop of the refrigerant, are sensitive to the pressure loss of the refrigerant, and the pressure loss of the refrigerant in the outdoor heat exchanger group needs to be reduced as much as possible, so the first outdoor heat exchanger can be controlled to be communicated with the air suction port of the compressor through the second control valve, the second outdoor heat exchanger can be controlled to be communicated with the throttling device through the third control valve, namely the first outdoor heat exchanger is connected with the second outdoor heat exchanger in parallel, the refrigerant from the throttling device is divided into two paths and respectively enters the first outdoor heat exchanger and the second outdoor heat exchanger, compared with the refrigerant from the throttling device which sequentially enters the first outdoor heat exchanger and the second outdoor heat exchanger, the pressure loss of a single-way pipeline is reduced, the frosting problem of an outdoor heat exchanger component is slowed down, the comfort of affecting the indoor temperature due to frequent defrosting is avoided, and meanwhile, the outlet pressure of the outdoor heat exchanger component and the heat exchange efficiency of the outdoor heat exchanger component are improved; when the air conditioning system is in a refrigerating mode, the first outdoor heat exchanger and the second outdoor heat exchanger are both positioned at the high pressure side of the main loop of the refrigerant and are insensitive to the pressure loss of the refrigerant, so that the first outdoor heat exchanger can be controlled to be communicated with the connecting branch through the second control valve, the second outdoor heat exchanger is controlled to be communicated with the connecting branch through the third control valve, namely the first outdoor heat exchanger and the second outdoor heat exchanger are connected in series, the refrigerant coming out of the throttling device sequentially enters the first outdoor heat exchanger and the second outdoor heat exchanger, the heat exchange time of the refrigerant in the outdoor heat exchanger assembly can be prolonged, and the heat exchange efficiency is higher.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a refrigerant flow of an air conditioning system in a heating defrost cycle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a refrigerant flow of an air conditioning system in a heating cycle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a refrigerant flow of an air conditioning system in a refrigeration anti-surge cycle according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a flow of a refrigerant when the air conditioning system is in refrigeration according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, "and/or" is merely an association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and that three cases of a alone exist, a and B together, and B alone exist. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The air conditioner performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
Referring to fig. 1 and 2, the air conditioning system according to the embodiment of the present invention includes a compressor 1, and a main refrigerant circuit connecting an exhaust port of the compressor 1 and an intake port of the compressor 1 as a circuit, wherein the main refrigerant circuit is sequentially connected in series with an indoor heat exchanger 2, a throttling device 3, and an outdoor heat exchanger assembly 4, the outdoor heat exchanger assembly 4 includes a first outdoor heat exchanger 41 and a second outdoor heat exchanger 42 connected in parallel, a first control valve 5 is further installed on the main refrigerant circuit, and the first control valve 5 is used for controlling the exhaust port of the compressor 1 to communicate with the outdoor heat exchanger assembly 4, the intake port of the compressor 1 to communicate with the indoor heat exchanger 2, or controlling the exhaust port of the compressor 1 to communicate with the indoor heat exchanger 2, and the intake port of the compressor 1 to communicate with the outdoor heat exchanger assembly 4. The air conditioning system further comprises a second control valve 6, a third control valve 7 and a connecting branch 11, wherein the second control valve 6 is arranged on a pipeline between the first outdoor heat exchanger 41 and the compressor 1 and is connected with the second outdoor heat exchanger 42 in parallel, the third control valve 7 is arranged on a pipeline between the second outdoor heat exchanger 42 and the throttling device 3 and is connected with the first outdoor heat exchanger 41 in parallel, one end of the connecting branch 11 is communicated with the second control valve 6, the other end of the connecting branch 11 is communicated with the third control valve 7, the second control valve 6 is used for controlling the first outdoor heat exchanger 41 to be communicated with the compressor 1 or the connecting branch 11, and the third control valve 7 is used for controlling the second outdoor heat exchanger 42 to be communicated with the connecting branch 11 or the throttling device 3.
The air conditioning system of the embodiment of the invention comprises a compressor 1, an indoor heat exchanger 2, a throttling device 3 and an outdoor heat exchanger component 4 which are sequentially connected in series on a main refrigerant circuit, wherein a first control valve 5 on the main refrigerant circuit can control the exhaust port of the compressor 1 to be communicated with the outdoor heat exchanger component 4, the air suction port of the compressor 1 to be communicated with the indoor heat exchanger 2, or the exhaust port of the compressor 1 to be communicated with the indoor heat exchanger 2, and the air suction port of the compressor 1 to be communicated with the outdoor heat exchanger component 4, so that the refrigerating or heating operation mode of the air conditioner is switched. In contrast to the prior art, the outdoor heat exchanger assembly 4 of the embodiment of the present invention includes the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 connected in parallel to each other, and the second control valve 6, the third control valve 7, and the connection branch 11, the second control valve 6 is installed on the pipe between the first outdoor heat exchanger 41 and the compressor 1 and connected in parallel to the second outdoor heat exchanger 42, the third control valve 7 is installed on the pipe between the second outdoor heat exchanger 42 and the throttle device 3 and connected in parallel to the first outdoor heat exchanger 41, one end of the connection branch 11 is communicated with the second control valve 6, and the other end of the connection branch 11 is communicated with the third control valve 7. When the air conditioning system is in a heating mode, the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are both positioned at the low pressure side of the main refrigerant circuit and are sensitive to the pressure loss of the refrigerant, and the pressure loss of the refrigerant in the outdoor heat exchanger group 4 needs to be reduced as much as possible, so that the first outdoor heat exchanger 41 can be controlled to be communicated with the air suction port of the compressor 1 through the second control valve 6, the second outdoor heat exchanger 42 is controlled to be communicated with the throttling device 3 through the third control valve 7, namely the first outdoor heat exchanger 41 is connected with the second outdoor heat exchanger 42 in parallel, the refrigerant coming out of the throttling device 3 is divided into two paths and respectively enters the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42, and compared with the refrigerant coming out of the throttling device 3, the pressure loss of a single-way pipeline is reduced, the problem of a heat exchanger component is slowed down, the problem of frequently forming the heat exchanger component is avoided, the indoor temperature is influenced, and meanwhile, the heat exchanger component pressure efficiency of the outdoor heat exchanger is improved; when the air conditioning system is in a refrigerating mode, the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are both positioned at the high pressure side of the main circuit of the refrigerant and are insensitive to the pressure loss of the refrigerant, so that the first outdoor heat exchanger 41 can be controlled to be communicated with the connecting branch 11 through the second control valve 6, the second outdoor heat exchanger 42 can be controlled to be communicated with the connecting branch 11 through the third control valve 7, namely the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are connected in series, the refrigerant coming out of the throttling device 3 sequentially enters the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42, the heat exchange time of the refrigerant in the outdoor heat exchanger assembly can be prolonged, the heat exchange efficiency is higher.
In some possible embodiments of the present invention, the air conditioning system further comprises a heat recovery branch 12 and a heat recovery unit 8, wherein the heat recovery branch 12 is connected between the compressor 1 and the throttling device 3 and is connected in parallel with the indoor heat exchanger 2, the heat recovery unit 8 comprises a first heat exchange flow path 81 and a second heat exchange flow path 82 which exchange heat with each other, the first heat exchange flow path 81 is connected on a pipeline between the outdoor heat exchanger assembly 4 and the throttling device 3, and the second heat exchange flow path 82 is connected on the heat recovery branch 12. Referring to fig. 1, when the air conditioning system performs a heating and defrosting mode, since the high-temperature refrigerant in the second heat exchange flow path 82 of the regenerator 8 can increase the temperature of the refrigerant in the first heat exchange flow path 81 of the regenerator 8, the temperature of the refrigerant entering the outdoor heat exchanger assembly 4 is higher, the outdoor heat exchanger assembly 4 can be defrosted, the air conditioning system can perform heating and defrosting processes simultaneously, start and stop of the compressor 1 are avoided, the state of the first control valve 5 is frequently changed (such as frequently commutated), the defrosting speed is faster, the indoor comfort is higher, and the service life of the air conditioning machine is prolonged. Referring to fig. 3, when the air conditioning system performs the cooling mode, since the high temperature refrigerant in the first heat exchange flow path 81 of the regenerator 8 can increase the temperature of the refrigerant in the second heat exchange flow path 82 of the regenerator 8, the temperature of the refrigerant entering the indoor heat exchanger 2 is reduced, that is, the refrigerant entering the indoor heat exchanger 2 is pre-cooled, so that the heat exchange of the indoor heat exchanger 2 is more sufficient, and after the refrigerant of the indoor heat exchanger 2 and the refrigerant with higher temperature from the second heat exchange flow path 82 in the regenerator 8 are combined, the temperature of the combined refrigerant can be increased, and the amount of liquid refrigerant in the combined refrigerant is reduced, thereby effectively avoiding the risk of liquid impact of the compressor 1 and prolonging the service life of the compressor 1.
In order to ensure that the pressure of the refrigerant flowing out of the heat recovery branch 12 is the same as the pressure of the refrigerant flowing out of the indoor heat exchanger 2 in the heating mode of the air conditioning system, so as to avoid the problem of refrigerant backflow caused by pressure difference, the air conditioning system of the embodiment of the invention further comprises a first regulating valve 9, wherein the first regulating valve 9 is arranged on the heat recovery branch 12 and is positioned between the second heat exchange flow path 82 of the heat regenerator 8 and the throttling device 3.
Similarly, in order to ensure that the pressure of the refrigerant flowing out of the heat recovery branch 12 is the same as the pressure of the refrigerant flowing out of the indoor heat exchanger 2 in the cooling mode of the air conditioning system, so as to avoid the problem of refrigerant backflow caused by pressure difference, the air conditioning system according to the embodiment of the invention further comprises a second regulating valve 10, wherein the second regulating valve 10 is installed on the heat recovery branch 12 and is positioned between the second heat recovery flow path of the heat recovery unit 8 and the compressor 1.
The first control valve 5 is an electronic reversing valve or an electromagnetic reversing valve, the second control valve 6 and the third control valve 7 are three-way control valves, the first regulating valve 9 and the second regulating valve 10 are electronic expansion valves, and the throttle device 3 is also an electronic expansion valve.
The embodiment of the invention also comprises a control method for the air conditioning system in the embodiment, which comprises the following steps:
when receiving the heating control signal, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger component, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, and the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device.
When receiving refrigeration control signals, the first control valve controls the exhaust port of the compressor to be communicated with the outdoor heat exchanger component, the air suction port of the compressor to be communicated with the indoor heat exchanger, the second control valve controls the first outdoor heat exchanger to be communicated with the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch.
The control method of the air conditioning system in the embodiment of the present invention can achieve the same technical effects as those of the air conditioning system in the above embodiment, and will not be described here again.
The air conditioning system further comprises a first regulating valve and a second regulating valve, wherein the first regulating valve is arranged on the regenerative branch and positioned between the second regenerative flow path of the regenerator and the throttling device, the second regulating valve is arranged on the regenerative branch and positioned between the second regenerative flow path of the regenerator and the compressor, and the control method further comprises the following steps:
When the air conditioning system is detected to meet the defrosting condition, the first control valve controls the air outlet of the compressor to be communicated with the indoor heat exchanger, the air suction inlet of the compressor is communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction inlet of the compressor, the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device, and the first regulating valve and the second regulating valve are opened.
When the air conditioning system is detected to meet the defrosting stop condition, the first regulating valve and the second regulating valve are closed.
The defrosting condition and the defrosting stop condition are both the prior art, for example, the defrosting condition is that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or the first outdoor heat exchanger and the second outdoor heat exchanger) is smaller than a first preset defrosting temperature, the duration that the temperature of the refrigerant in the first outdoor heat exchanger is smaller than the first preset defrosting temperature is longer than a first preset time, and the defrosting stop condition is that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or the first outdoor heat exchanger and the second outdoor heat exchanger) is longer than a second preset defrosting temperature. The outdoor heat exchanger assembly is provided with a temperature sensor, and the temperature sensor detects the temperature of the refrigerant in the first outdoor heat exchanger, the temperature of the refrigerant in the second outdoor heat exchanger, or the temperature of the refrigerant in the first outdoor heat exchanger and the temperature of the refrigerant in the second outdoor heat exchanger. The air conditioning system further includes a timer for timing a duration of time that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or both) is less than the first preset defrost temperature.
The control step can realize simultaneous heating and defrosting, avoid starting and stopping of the compressor, and has higher defrosting speed and higher indoor comfort level.
After the first regulating valve and the second regulating valve are opened, the control method according to the embodiment of the invention further includes:
And when detecting that the pressure of the refrigerant on the regenerative branch close to the opening at one end of the compressor is different from the pressure of the refrigerant on the indoor heat exchanger close to the opening at one end of the compressor, adjusting the opening of the first regulating valve.
The first pressure sensor is arranged at the opening part of the regenerative branch close to one end of the compressor, and can detect the pressure of the refrigerant of the regenerative branch close to the opening part of one end of the compressor, and the second pressure sensor is arranged at the opening part of the indoor heat exchanger close to one end of the compressor, and can detect the pressure of the refrigerant of the regenerative branch close to the opening part of one end of the compressor. The opening degree of the first regulating valve is regulated to ensure that the pressure of the refrigerant on the regenerative branch close to the opening at one end of the compressor is the same as the pressure of the refrigerant on the indoor heat exchanger close to the opening at one end of the compressor, so that the problem of refrigerant backflow is avoided.
Based on the above embodiment, the control method of the air conditioning system further includes:
after receiving the refrigeration control signal, when detecting that the suction superheat degree of the air conditioning system is in a first preset temperature range and the duration time of the suction superheat degree of the air conditioning system in the first preset temperature range is longer than preset time, opening the first regulating valve and the second regulating valve.
And when the suction superheat degree of the air conditioning system is in a second preset temperature range, closing the first regulating valve.
The air-conditioning system may have a suction superheat degree in a first preset temperature range, where the suction superheat degree of the air-conditioning system is lower than a preset temperature (e.g., 0 ℃), the suction superheat degree is equal to a suction temperature minus a saturation temperature corresponding to a suction pressure, the suction temperature is a temperature at which the refrigerant enters the compressor, the suction temperature is detected by a temperature sensor installed at an air suction port of the compressor, the suction pressure is detected by a pressure sensor installed at the air suction port of the compressor, and a duration of the air-conditioning system in which the suction superheat degree of the air-conditioning system is lower than the preset temperature is counted by the timer. The air-conditioning system air suction superheat degree is in the second preset temperature range, and the air-conditioning system air suction superheat degree can be 0-5 ℃.
When the air conditioning system is in refrigeration and the suction superheat degree of the air conditioning system is detected to be in a first preset temperature range, and the duration of the suction superheat degree of the air conditioning system in the first preset temperature range is longer than the preset time (namely, the liquid impact prevention condition is met), the temperature of the refrigerant flowing out of the second heat exchange flow path of the heat regenerator and the temperature of the refrigerant flowing out of the indoor heat exchanger after the refrigerant is converged can be improved by opening the first regulating valve and the second regulating valve (the air conditioning system enters the refrigeration liquid impact prevention mode), the amount of liquid refrigerant in the refrigerant after the refrigerant is converged is reduced, so that the risk of effectively avoiding the liquid refrigerant from being injected into the compressor is avoided, and the service life of the compressor is prolonged. When the suction superheat degree of the air conditioning system is in the second preset temperature range (i.e. the liquid impact prevention end condition is satisfied), as shown in fig. 4 in combination with fig. 3, the first regulating valve 9 and the second regulating valve 10 are closed, so that the refrigerant enters the indoor heat exchanger.
Similarly, when the air conditioning system is in the refrigeration anti-liquid impact mode, the control method further comprises, after opening the first regulating valve and the second regulating valve:
And when detecting that the pressure of the refrigerant on the regenerative branch, which is close to the opening at one end of the first control valve, is different from the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening at one end of the throttling device, the opening of the second regulating valve is regulated.
And a third pressure sensor is arranged at the opening part of the regenerative branch close to one end of the first control valve, the third pressure sensor can detect the pressure of the refrigerant at the opening part of the regenerative branch close to one end of the first control valve, a fourth pressure sensor is arranged at the opening part of the indoor heat exchanger close to one end of the throttling device, and the fourth pressure sensor can detect the pressure of the refrigerant at the opening part of the indoor heat exchanger close to one end of the throttling device. According to the control method, the opening degree of the second regulating valve is regulated, so that the pressure of the refrigerant on the regenerative branch, which is close to the opening of one end of the first regulating valve, is identical to the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening of one end of the throttling device, and the problem of refrigerant backflow is avoided.
When the defrosting stop condition is met, the first regulating valve and the second regulating valve are closed, the preset time (such as 3 minutes) is waited, whether the defrosting condition is met or not is verified again, and if yes, the defrosting mode is entered again, so that the defrosting effect is ensured. Similarly, when the air conditioning system is in the liquid impact prevention ending condition, the first regulating valve and the second regulating valve are closed, the preset time (such as 3 minutes) is waited, whether the liquid impact prevention condition is met or not is verified again, if so, the liquid impact prevention mode is entered again, and therefore the safety of the air conditioning system is ensured.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. An air conditioning system, comprising:
a compressor;
the refrigerant main loop connects the exhaust port of the compressor and the air suction port of the compressor into a loop, an indoor heat exchanger, a throttling device and an outdoor heat exchanger component are sequentially connected in series on the refrigerant main loop, and the outdoor heat exchanger component comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel;
A first control valve installed on the refrigerant main circuit, the first control valve being for controlling the discharge port of the compressor to communicate with the outdoor heat exchanger assembly, the suction port of the compressor to communicate with the indoor heat exchanger, or the discharge port of the compressor to communicate with the indoor heat exchanger, the suction port of the compressor to communicate with the outdoor heat exchanger assembly;
A connection branch;
A second control valve installed on a pipe between the first outdoor heat exchanger and the compressor and connected in parallel with the second outdoor heat exchanger;
The third control valve is arranged on a pipeline between the second outdoor heat exchanger and the throttling device and is connected with the first outdoor heat exchanger in parallel, one end of the connecting branch is communicated with the second control valve, the other end of the connecting branch is communicated with the third control valve, the second control valve is used for controlling the first outdoor heat exchanger to be communicated with the compressor or the connecting branch, and the third control valve is used for controlling the second outdoor heat exchanger to be communicated with the connecting branch or the throttling device;
The heat recovery branch is connected between the compressor and the throttling device and is connected with the indoor heat exchanger in parallel;
the heat regenerator comprises a first heat exchange flow path and a second heat exchange flow path which exchange heat mutually, the first heat exchange flow path is connected to a pipeline between the outdoor heat exchanger component and the throttling device, and the second heat exchange flow path is connected to the heat regeneration branch.
2. An air conditioning system according to claim 1, further comprising:
the first regulating valve is arranged on the heat return branch and is positioned between the second heat return flow path of the heat regenerator and the throttling device.
3. The air conditioning system according to claim 1 or 2, further comprising:
and the second regulating valve is arranged on the heat return branch and is positioned between a second heat return flow path of the heat regenerator and the compressor.
4. A control method for an air conditioning system according to any one of the preceding claims 1 to 3, characterized by comprising the steps of:
When a heating control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, and the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device;
when a refrigeration control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the outdoor heat exchanger component, the air suction port of the compressor to be communicated with the indoor heat exchanger, the second control valve controls the first outdoor heat exchanger to be communicated with the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch.
5. The control method of an air conditioning system according to claim 4, further comprising a first regulating valve mounted on the regenerative branch between the second regenerative flow path of the regenerator and the throttle device, and a second regulating valve mounted on the regenerative branch between the second regenerative flow path of the regenerator and the compressor, the control method further comprising:
When the air conditioning system is detected to meet a defrosting condition, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device, and the first regulating valve and the second regulating valve are opened;
And closing the first regulating valve and the second regulating valve when the air conditioning system is detected to meet a defrosting stop condition.
6. The control method of an air conditioning system according to claim 5, further comprising, after said opening of said first and second regulating valves:
And when detecting that the pressure of the refrigerant on the regenerative branch, which is close to the opening of the compressor, is different from the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening of the compressor, the opening of the first regulating valve is regulated.
7. The control method of an air conditioning system according to claim 5, further comprising:
After receiving a refrigeration control signal, when detecting that the suction superheat degree of an air conditioning system is in a first preset temperature range and the duration time of the suction superheat degree of the air conditioning system in the first preset temperature range is longer than preset time, opening the first regulating valve and the second regulating valve;
and when the suction superheat degree of the air conditioning system is in a second preset temperature range, closing the first regulating valve.
8. The control method of an air conditioning system according to claim 7, further comprising, after said opening of said first and second regulating valves:
And when detecting that the pressure of the refrigerant on the regenerative branch, which is close to the opening at one end of the first control valve, is different from the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening at one end of the throttling device, adjusting the opening of the second regulating valve.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743749A (en) * | 2004-09-01 | 2006-03-08 | 海尔集团公司 | Refrigerating system for heat pump air conditioner and its realizing method |
| CN201811509U (en) * | 2010-09-13 | 2011-04-27 | 广州天河兰石技术开发有限公司 | A refrigeration device with adjustable evaporating pressure and flow rate |
| CN104764112A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Air conditioning system achieving indoor uninterruptible heating in defrosting process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203298405U (en) * | 2013-05-20 | 2013-11-20 | 南京迪泽尔空调设备有限公司 | Air source heat pump unit increasing flowing speed of refrigerating fluid |
| JP2015102311A (en) * | 2013-11-27 | 2015-06-04 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743749A (en) * | 2004-09-01 | 2006-03-08 | 海尔集团公司 | Refrigerating system for heat pump air conditioner and its realizing method |
| CN201811509U (en) * | 2010-09-13 | 2011-04-27 | 广州天河兰石技术开发有限公司 | A refrigeration device with adjustable evaporating pressure and flow rate |
| CN104764112A (en) * | 2015-04-19 | 2015-07-08 | 上海交通大学 | Air conditioning system achieving indoor uninterruptible heating in defrosting process |
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Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant after: Hisense Air Conditioning Co.,Ltd. Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd. |
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